Bohrium
Isotopes

Isotope
Half-life
Decay mode
Discovery year
Reaction
260Bh
35 ms
α
2007
209Bi(52Cr,n)
261Bh
11.8 ms
α
1986
209Bi(54Cr,2n)
262Bh
84 ms
α
1981
209Bi(54Cr,n)
262mBh
9.6 ms
α
1981
209Bi(54Cr,n)
264Bh
0.97 s
α
1994
272Rg(—,2α)
265Bh
0.9 s
α
2004
243Am(26Mg,4n)
266Bh
0.9 s
α
2000
249Bk(22Ne,5n)
267Bh
17 s
α
2000
249Bk(22Ne,4n)
270Bh
61 s
α
2006
282Nh(—,3α)
271Bh
1.2 s
α
2003
287Mc(—,4α)
272Bh
9.8 s
α
2005
288Mc(—,4α)
274Bh
40 s
α
2009
294Ts(—,5α)
278Bh
11.5 min?
SF
1998?
290Fl(e−,νe3α)?

Question: What are the half-lives of the Bohrium isotopes ²⁷⁰Bh and ²⁷⁴Bh?
Answer: The Bohrium isotopes ²⁷⁰Bh and ²⁷⁴Bh have an half-lives of about 61 s and 40 s.